Table S1.

ICD-9 codes for identifying aortic valve disease patients

Aortic valve disease patients identified by any of these primary diagnosis codes
395	Diseases of aortic valve
395.0	Rheumatic aortic stenosis
395.2	Rheumatic aortic stenosis with insufficiency
424.1	Aortic valve disorders
746.3	Congenital stenosis of aortic valve; congenital aortic stenosis
Mitral valve disease patients identified by any of these primary diagnosis codes
394.0	Mitral stenosis
394.9	Other, an unspecified mitral valve disease
424.0	Mitral valve disorders
746.5	Congenital stenosis of mitral valve
746.6	Congenital mitral insufficiency

Abbreviation: ICD, International Classification of Diseases.